In medical terminology, what does the suffix "-uria" refer to?

The suffix "-uria" pertains specifically to conditions related to urine. In medical terminology, it denotes the presence of certain substances in urine, or a condition affecting urine production or characteristics. For instance, conditions such as hematuria (blood in urine) and proteinuria (excess protein in urine) directly employ this suffix, indicating their specific relationships to urine.

The other options relate to different bodily systems and conditions that do not involve urine. A condition of the blood, infections, or heart conditions would be represented by different suffixes or terms that do not include "-uria." Thus, the identification of "-uria" as relating to urine is accurate and highlights its significance in understanding various urinary conditions and diagnoses.